202490 has 8 divisors (see below), whose sum is σ = 364500. Its totient is φ = 80992.

The previous prime is 202481. The next prime is 202493. The reversal of 202490 is 94202.

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 6241 = 443^2 + 79^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10115 + ... + 10134.

2²⁰²⁴⁹⁰ is an apocalyptic number.

202490 is a deficient number, since it is larger than the sum of its proper divisors (162010).

202490 is a wasteful number, since it uses less digits than its factorization.

202490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20256.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 202490 is about 449.9888887517. The cubic root of 202490 is about 58.7220479676.

Adding to 202490 its reverse (94202), we get a palindrome (296692).

The spelling of 202490 in words is "two hundred two thousand, four hundred ninety".